PIPER
AIRCRAFT
CORPORATION
PA-28-161,
WARRIOR
II
SECTION
6
WEIGHT
AND
BALANCE
6.9
INSTRUCTIONS
FOR
USING
THE
WEIGHT
AND
BALANCE
PLOTTER
This plotter
is
provided to enable the pilot quickly and conveniently to:
(a) Determine the total weight
and
C.G. position ..
(b) Decide how
to
change his load if his first loading
is
not within the
allowable envelope.
Heat can
warp
or
ruin the plotter if it is left in the sunlight. Replace-
ment plotters may be purchased from Piper dealers
and
distributors.
The
"Basic Empty Weight
and
Center
of
Gravity" location
is
taken from
the Weight
and
Balance
Form
(Figure 6-5), the Weight
and
Balance Record
(Figure 6-7)
or
the latest FAA major repair
or
alteration form.
The plotter enables the user to
add
weights
and
corresponding moments
graphically.
The
effect
of
adding
or
disposing
of
useful load. can easily be
seen.
The
plotter does not cover the situation where cargo
is
loaded in
locations other
than on
the seats
or
in
the
baggagt; compartments.
Brief instructions are given on the plotter itself. To use it, first plot a
point on the grid
to
locate the basic weight
and
C.G. location. This can
be
put
on more
or
less permanently because it will not change until the airplane
is
modified. Next, position the zero weight end
of
any one
of
the loading slots
over this point.
Using a pencil, draw a line
along
the slot
to
the weight which
will be carried in
that
location. Then position the zero weight end
of
the next
slot over the end
of
this line
and
draw
another
line representing the weight
which will be located in this second position. When all the loads have been
drawn in this manner, the final end
of
the segmented line locates the total
load
and
the
C.
G. position
of
the airplane for takeoff.
If
this point
is
not
within the allowable envelope
it
will
be
necessary
to
remove fuel, baggage,
or
passengers
and
I
or
to
rearrange baggage
and
passengers
to
get
the
final point
to fall within the envelope.
Fuel
burn-off does
not
significantly affect the center
of
gravity.
ISSUED:
AUGUST
13, 1982
REPORT:
V:S.1180
6-15
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